A cast type ceiling tile comprising a mixture containing 30 to 70% mineral wool, 10 to 40% expanded glass beads, 8 to 20% starch, 0 to 15% stucco, and 0 to 1% boric acid. The method and system secure the freight by using rotatable clamping mechanisms configure to apply axial pressure to the freight so as to prevent movement or shifting in transit. A protrusion is provided on the second principal surface and a second conductive layer is formed so as to cover the outer surface of the protrusion. The first and second ends of the electrical conductor assembly are substantially aligned to the central axis of the bore at each end by the centering assemblies, the centering assemblies being adapted to allow fluid to pass through the bore. Sets of mold sections useful for molding toric contact lenses as provided.